Four different boxes of physics textbooks are on a table. The weight of each box is balanced by an upward force or normal force provided by the table. Each box (A–D) is subjected to different horizontal forces as shown in the free-body diagrams below.

What is the magnitude of the acceleration, in m/s2, of the box of books labeled D?

Avector a⃗ has a length of 8.6 m and points in the negative x direction. find the x component of the vector −3.7a⃗ .

50.)the diagram below represents the wave fronts produced by a point source moving to the right in a uniformmedium. observers are located at points a and b.compared to the wave frequency and wavelength observed at point a, the wave observed at point b has a(1) higher frequency and a shorter wavelength(2) higher frequency and a longer wavelength(3) lower frequency and a shorter wavelength(4) lower frequency and a longer wavelength

Which type of heating system is often used to heat many buildings from a central location